Permalink problem 404 Wordpress site

Good evening

I have trasferred my site in linode and point the dns to linode.

My website is ok but when i set every permalink different from simple, the pages after home give me error 404.

Why?

I wonder to have set correctly the htaccess and i have enabled mod_rewrite in apache.

This is my htaccess

RewriteEngine On

RewriteBase /

RewriteRule ^index.php$ - [L]

RewriteCond %{REQUEST_FILENAME} !-f

RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule . /index.php [L]

I have ubuntu 14.04

Best regards